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18-5
TCP Port Options
18.4. Selective Read
This function allows Telnet users to read a selected type of buffered
data from the VIP unit. In other words, the Selective Read function
automatically sets a data partition based on the port number specified in the
Telnet connect command. Data can be selected according to data type and
the VIP port which originally received the data. The following data types
can be selected:
All: Both alarm data and non-alarm data.
Standard: Non-alarm data.
Alarm 1: Data which matched Alarm Filter One.
Alarm 2: Data which matched Alarm Filter Two.
Notes:
When the Selective Read Mode is active, all VIP command
menus, status screens and ^Bnn commands will function
normally.
In Selective Read mode, Data can be sent in either Standard
Telnet Protocol or Raw Socket Mode, depending on the port
number entered in the Telnet connect command.
The Selective Read Mode will use the polling parameters
currently selected by the Network Port Configuration menu.
If the Auto Delete function is enabled at the target input port,
data will be automatically deleted as soon as the polling device
acknowledges reception.
A Partition will not be set if the desired data file is empty. Even
though the partition is automatically set, it is recommended to
invoke command ^B01 using the appropriate arguments for the
desired data.
When a Telnet connection is established using the Selective Read option,
the following events will occur:
1. Upon connection, the VIP will send "POLLCAT NETLINK" (and the
site ID, if defined) and then wait for a password.
2. If a valid password is entered, the VIP will send the "READY"
message, and set the data partition as specified by the port number
used in the Telnet connect command.
Port Numbers for Selective Read Function
The Selective Read function is activated when one of the port numbers,
shown in the tables on the next page, are included in the Telnet
connect command.
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